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Downhole throttling device based on special degradable alloy ball tapered plug adjustment

A throttling device and alloy ball technology, which is applied in wellbore/well valve device, wellbore/well components, earth-moving drilling, etc., can solve the complex process, time-consuming and laborious, and inability to adjust the throttling area of ​​the gas nozzle. And other issues

Active Publication Date: 2021-06-08
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the choke nozzle diameter of the conventional downhole choke is fixed, and the choke area of ​​the gas nozzle cannot be adjusted according to the change of the downhole pressure. This process is complex, time-consuming and laborious, and extremely inconvenient

Method used

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  • Downhole throttling device based on special degradable alloy ball tapered plug adjustment
  • Downhole throttling device based on special degradable alloy ball tapered plug adjustment
  • Downhole throttling device based on special degradable alloy ball tapered plug adjustment

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0017] refer to figure 1 , a downhole throttling device adjusted based on a special degradable alloy ball-taper plug, which is threadedly connected to the central axis of the throttle, including an upper seat 2 and a lower seat 5 with a clearance fit, and a cavity between the upper seat 2 and the lower seat 5 The chamber is equipped with a spring 3, a ball cone plug 4 and a small sealing ring 8, the spring 3 is installed in the groove of the upper seat 2, the upper end of the ball cone plug 4 goes deep into the interior of the spring 8, and the lower end of the ball cone plug 4 matches the taper hole of the lower seat 5 , a small sealing ring 8 is installed at the joint between the upper seat 2 and the lower seat 5; the upper seat 2 and the lower seat 5 are assembled together in the fixed cover 1, and are sealed by the upper and lower large sealing rings 7, and the l...

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Abstract

The invention provides a downhole throttling device based on special degradable alloy ball tapered plug adjustment. An upper seat and a lower seat are in clearance fit, and a spring, a ball tapered plug and a small sealing ring are mounted in a cavity between the upper seat and the lower seat; the upper seat and the lower seat are assembled in a fixed cover together after being matched, large sealing rings are mounted at the upper part and the lower part for sealing, and then a sand prevention end cover is screwed on the fixed cover through threaded connection to fix the upper seat and the lower seat; and a sand prevention net, a check ring a and a check ring b are sequentially mounted on the sand prevention end cover and then are fixed through screws. According to the throttling principle, the defect that a conventional downhole throttling device needs to be salvaged repeatedly when an air tap is replaced is overcome, and the downhole throttling device has the advantage that the throttling area can be adjusted in real time according to changes of downhole pressure; and meanwhile, the ball tapered plug is made of a Mg-Al alloy, the ball tapered plug can be completely degraded in the production tail of a gas well, thus the throttling area is increased, the yield is increased, the natural gas extraction efficiency is improved, and manpower, material resources and financial resources are saved.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas industry, and in particular relates to a downhole throttling device adjusted based on a special degradable alloy ball cone plug. Background technique [0002] Natural gas is a high-quality, efficient, green and clean low-carbon energy. Accelerating the development and utilization of natural gas is an important way for my country to promote the revolution of energy production and consumption and build a clean, low-carbon, safe and efficient modern energy system. However, natural hydrates are easily formed during the extraction of natural gas, which brings a series of problems, such as blockage of well bores, pipelines, valves, etc., which greatly affects the efficiency of natural gas extraction. In addition, due to the extremely high pressure of natural gas in the well, the pressure of the wellhead and the pipeline will be too high during the production process, accompanied by hu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/08
CPCE21B34/08Y02E10/20
Inventor 李万钟邓冲徐建宁金丹丹段毅毅雒晓盼
Owner XI'AN PETROLEUM UNIVERSITY
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